Classification of protective layers for hammer crusher hammer discs:

The hammer disc of a hammer crusher is considered a vulnerable component and can be used for six or seven years with proper protection. Typically, Q235 steel is used for the hammer disc material. Through a dual-layer bright ion metal infiltration technique, the Mo-Cr co-infiltration is performed on the surface of this steel. Subsequently, it undergoes supersaturated carbon infiltration, quenching, and tempering compound treatment. The Mo-Cr diffusion layer thickness is above 100 micrometers, with a surface Mo content of up to 20% and Cr content reaching 10%. The surface carbon content after supersaturated carbon infiltration exceeds 2.0%, and the surface composition is close to molybdenum-based high-speed steel. After quenching and tempering, the surface hardness reaches 1300HV, surpassing that of conventional metallurgical high-speed steel. Wear tests show that the friction coefficient increases with increasing contact stress, and the average relative wear resistance is 2.2 times that of GCr15 carbonized and quenched steel.

Although Q235 steel material has better wear resistance compared to common steel, Shandong Sanxiang Heavy Machinery applies an additional layer of wear-resistant welding rod to the surface of the hammer disc during production to further enhance its wear resistance. In the daily production process, when maintaining the machine, maintenance workers should always pay attention to the wear degree of the surface wear-resistant welding rod on the hammer disc. If severe wear is detected in certain areas, timely repair with wear-resistant welding rod is necessary to prevent further wear of the hammer disc. Many customers have found it troublesome to repair the hammer disc with wear-resistant welding rod. Is there a better solution to address the problem of hammer disc wear?

Shandong Sanxiang Heavy Machinery Co., Ltd. has developed a protective wear ring for the hammer disc of the hammer crusher to address this issue according to customer requirements. It is made using high-chromium alloy technology and incorporates over 20 trace elements, including molybdenum and manganese. Through processes such as quenching and tempering, they produce highly wear-resistant alloy steel. The specific usage involves securing the wear ring components to the hammer disc one by one using screws, creating a sealed protective ring layer on the surface of the hammer disc. When the wear ring is almost worn out, there is no need for the troublesome process of repairing it with wear-resistant welding rods. Instead, you can simply remove the worn part of the wear ring and replace it with a new one. It's incredibly convenient and is highly favored by a large number of customers.

Currently, Shandong Sanxiang Heavy Machinery offers these two methods for protecting the hammer disc from wear. Using the wear ring material is slightly more expensive than using wear-resistant welding rods. When customers are specifying the machine, they should be clear about the type of protective layer they want to avoid any misunderstandings regarding the price later on.